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Acta Cryst. (2009). E65, m436-m437 [ doi:10.1107/S1600536809010150 ]
![[mu]](/logos/entities/mu_rmgif.gif)
-aqua-aqua[4-ethyl (dichloromethylene)diphosphonato]sesquicalcium(II)] acetone hemisolvate 4.5-hydrate]Abstract: The title compound, {[Ca1.5(C3H5Cl2O6P2)(H2O)2]·0.5CH3COCH3·4.5H2O}n, has a two-dimensional polymeric structure. The asymmetric unit contains two crystallographically independent Ca2+ cations connected by a chelating and bridging ethyl (dichloromethylene)diphosphonate(3-) ligand and an aqua ligand. One of the Ca atoms, lying on a centre of symmetry, has a slightly distorted octahedral geometry, while the other Ca atom is seven-coordinated in a distorted monocapped trigonal-prismatic geometry. The polymeric layers are further connected by extensive O-H
O hydrogen bonding into a three-dimensional supramolecular network. The acetone solvent molecule and one uncoordinated water molecule are located on twofold rotation axes.
Online 25 March 2009
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